# Relationship history for MSHA mine 4604158

Current hierarchy: **Lilly Ronald D → Emblem Coal Company → No 1 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** L B Bennett Coal Company → No 1 Mine; 1972-06-01 to 1974-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Bennett L B Coal Co → No 1 Mine; 1972-06-01 to 1974-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Bennett L B Coal Co → L B Bennett Coal Company; 1972-06-01 to 1974-07-31; source msha-controller-operator-history
- **operator_operates_mine:** John Boy Coal Company → No 1 Mine; 1974-08-01 to 1975-04-22; source msha-controller-operator-history
- **controller_controls_mine:** Davis Virginia → No 1 Mine; 1974-08-01 to 1975-04-22; source msha-controller-operator-history
- **controller_controls_operator:** Davis Virginia → John Boy Coal Company; 1974-08-01 to 1975-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Emblem Coal Company → No 1 Mine; 1975-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lilly Ronald D → No 1 Mine; 1975-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lilly Ronald D → Emblem Coal Company; 1975-04-23 to current/open; source msha-controller-operator-history